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YACHT STABILITY

CODE 66400
ACADEMIC YEAR 2020/2021
CREDITS 6 credits during the 1st year of 9268 YACHT DESIGN (LM-34) LA SPEZIA
SCIENTIFIC DISCIPLINARY SECTOR ING-IND/01
LANGUAGE English
TEACHING LOCATION LA SPEZIA (YACHT DESIGN)
SEMESTER 1° Semester
MODULES This unit is a module of:
TEACHING MATERIALS AULAWEB

AIMS AND CONTENT

LEARNING OUTCOMES

The aim of the course is to provide knowledge and skills about ships buoyancy and stability, in relation with both the intact and the damaged condition. A specific reference is given to the relevant IMO rules, discussing their impact on the ship design process.

AIMS AND LEARNING OUTCOMES

the course will enalble the capabilities to:

- design ships (especially passenger ships) in compliance with the most important international rules about buoyancy and stability of ships both in intact and damaged conditions

- calculate the final equilibrium condition and the relevan stability of a ship in damged condition.

 

TEACHING METHODS

Lectures in classrom;

Practical applications in classrooms.

 

SYLLABUS/CONTENT

Safety as a constraint/target in the design of units having passengers as a payload   

Introduction to the Rule Making environment: IMO, Flag State, Classification Societies.

The righting arm (RA):

- relation between  RA and ship main dimensions (midship section)

- the RA at very high heel angles

- the down-flooding angle: watertight and weather-tight closures

- influence on the righting arm deriving from

  • Trim (initial trim, “free to trim”)

  • Wave profile

The linear roll motion of ship for the evaluation of  the roll period

Inclining moments:

- effect of wind

- effect of turning at speed

The Intact Stability Code 2008

- General stability criteria

- Wave and wind combined effect (whether criterion)

- Special requirements for passenger ships

Lightship weigh estimation

Inclining experiment

Solutions for the ship in damage:

- loading of weight  method

- constant displacement method

Deterministic methodology for safety subdivision (former SOLAS)

- Allowable length curve

Probabilistic methodology for safety subdivision (SOLAS 2009)

- Required subdivision index R

- Attained subdivision index A

- Probabilistic parameter relevant to the damage p,r,v

- Probabilistic parameter relevant  the ship survivability s

Grounding

The stability of underwater vehicles

 

 

RECOMMENDED READING/BIBLIOGRAPHY

IMO safety rules relevant to the intact and damaged ship stability.

TEACHERS AND EXAM BOARD

Exam Board

PAOLA GUALENI (President)

STEFANO GAGGERO (President Substitute)

GIULIANO VERNENGO (President Substitute)

DIEGO VILLA (President Substitute)

MICHELE VIVIANI (President Substitute)

LESSONS

TEACHING METHODS

Lectures in classrom;

Practical applications in classrooms.

 

LESSONS START

In compliance with the semester scheduling.

Class schedule

All class schedules are posted on the EasyAcademy portal.

EXAMS

EXAM DESCRIPTION

Oral exam.

In order to be admitted to the oral exam, students have to present and discuss with the teacher the two assignements given during the semester in classrooom.

ASSESSMENT METHODS

Oral exam: two open questions about the topics developed in classroom during the semester. One of the two questions in relation with the topics of the assignements.

Questions are aimed to assess the capability of the students to discuss about theorethical and practical aspects of ship hydrostatics and stability.

Specific attention will be given to the capability of indicating the basic assuptions together with the input data, the target of the procedure and its rational developement.

During the (previous) conversation about the assignements, the students will be requested to give evidence of capability to apply in practice the theorethical methodologies with the proper critical attitude toward results.

Exam schedule

Date Time Location Type Notes
11/01/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam. Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale.
25/01/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam. Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale.
08/02/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam. Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale.
07/06/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale
21/06/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale
12/07/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale
13/09/2021 09:00 LA SPEZIA Orale The two written assignements specified during the semester are to be discussed during the oral exam Le due esercitazioni scritte assegnate durante il semestre saranno discusse all'orale